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She said: “I was completely spun out all day after I found it – it’d been just sat with the post for three days until I could find a quiet time time to sort my phone.

“It’s a bit worrying when you’ve got kids. I’m just nervous it being in the house with two children to be honest – the sooner they (the police) take it away, the better.

The bag containing the unknown powder believed to be heroin (Image: Penny Cross)

“My kids are good as gold and wouldn’t go opening the post but it is worrying – there’s always a risk. Especially if a teenager got their hands on it perhaps."

She added: "We’ll have to be a lot more careful now.

“I think the person who’s sold it was completely oblivious because he/she wrote on their online account that they open and check all of the goods they sells to make sure they haven’t been broken in transit.

“I just thought what are these extra packages? I opened it and ran out to my husband saying ‘oh my god look what I’ve just found."